Drones: the eye in the sky (and oceans)

Sgt. Scott Weaver, of the Queen's Royal Lancers, is seen launching a Black Hornet Nano unmanned air vehicle from a compound in Afghanistan in 2013. British troops in Afghanistan are the first to use the small surveillance helicopters, which measure 10 by 2.5 centimeters and are equipped with a tiny camera that gives troops video and still images.